Damaged timber girders due to negative pressurization - root causes and action plans

Purpose of the work
Especially when dealing with indoor pools the existing ventilation system is often used for negative pressurization on the building envelope to protect the roof structure from damage caused by convection. As seasons change, however, air leaks from the outside lead to high indoor humidity fluctuations. These fluctuations may cause timer shrinkage which ultimately might damage the roof structures consisting of laminated wood.
Method of approach

FLiB-Qualification: Training for tradesmen – Airtight sealing

Purpose of the work
Only qualified specialists can deliver airtight building envelopes. Unfortunately, such airtight envelopes still have many defects after completion, causing all kinds of adverse effects. This course is intended to train and qualify contractors and workers to ensure that they are able to seal building envelopes without instructions, safely and without defects - as far as this is possible.
Method of approach

Statistical analyses of about 420,000 measurements of the French database of building airtightness

Purpose of the work
The French database of building airtightness has been fed by measurements performed by qualified testers since 2006. The database is enlarged each year by more than 65,000 measurements since 2016, making the total number of measurements about 420,000 at the end of 2018. This work presents a statistical analyses of the French database of building airtightness.
Method of approach

VIP 45.6: Trends in building and ductwork airtightness in France

AIVC's Ventilation Information Paper #45.6 summarizes current knowledge on trends in building and ductwork airtightness in France.

A recorded presentation covering this topic is also available in English & French

VIP 45.5: Trends in building and ductwork airtightness in Latvia

AIVC's Ventilation Information Paper #45.5 summarizes current knowledge on trends in building and ductwork airtightness in Latvia.

A recorded presentation covering this topic is also available at this link.

 

 

VIP 45.4: Trends in building and ductwork airtightness in Belgium

AIVC's Ventilation Information Paper #45.4 summarizes current knowledge on trends in building and ductwork airtightness in Belgium.

A recorded presentation covering this topic is also available at this link.

VIP 45.3: Trends in building and ductwork airtightness in the Czech Republic

AIVC's Ventilation Information Paper #45.3 summarizes current knowledge on trends in building and ductwork airtightness in the Czech Republic.

A recorded presentation covering this topic is also available at this link.

 

VIP 45.2: Trends in building and ductwork airtightness in Spain

AIVC's Ventilation Information Paper #45.2 summarizes current knowledge on trends in building and ductwork airtightness in Spain.

A recorded presentation covering this topic is also available at this link.

VIP 45.1: Trends in building and ductwork airtightness in Estonia

AIVC's Ventilation Information Paper #45.1 summarizes current knowledge on trends in building and ductwork airtightness in Estonia.

TN 69: 40 years to build tight and ventilate right: History of the AIVC

As the AIVC was created in 1979, the 40th anniversary of the AIVC was celebrated in October 2019 at the 40th AIVC conference in Ghent. In the context of this celebration, it was decided to publish 2 overview publications:

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